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Diffstat (limited to 'crypto/openssh/md5crypt.c')
| -rw-r--r-- | crypto/openssh/md5crypt.c | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/crypto/openssh/md5crypt.c b/crypto/openssh/md5crypt.c deleted file mode 100644 index 22ef989..0000000 --- a/crypto/openssh/md5crypt.c +++ /dev/null @@ -1,167 +0,0 @@ -/* - * ---------------------------------------------------------------------------- - * "THE BEER-WARE LICENSE" (Revision 42): - * <phk@login.dknet.dk> wrote this file. As long as you retain this - * notice you can do whatever you want with this stuff. If we meet some - * day, and you think this stuff is worth it, you can buy me a beer in - * return. Poul-Henning Kamp - * ---------------------------------------------------------------------------- - */ - -#include "includes.h" - -#if defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT) -#include <sys/types.h> - -#include <string.h> - -#include <openssl/md5.h> - -/* 0 ... 63 => ascii - 64 */ -static unsigned char itoa64[] = - "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; - -static char *magic = "$1$"; - -static char * -to64(unsigned long v, int n) -{ - static char buf[5]; - char *s = buf; - - if (n > 4) - return (NULL); - - memset(buf, '\0', sizeof(buf)); - while (--n >= 0) { - *s++ = itoa64[v&0x3f]; - v >>= 6; - } - - return (buf); -} - -int -is_md5_salt(const char *salt) -{ - return (strncmp(salt, magic, strlen(magic)) == 0); -} - -char * -md5_crypt(const char *pw, const char *salt) -{ - static char passwd[120], salt_copy[9], *p; - static const char *sp, *ep; - unsigned char final[16]; - int sl, pl, i, j; - MD5_CTX ctx, ctx1; - unsigned long l; - - /* Refine the Salt first */ - sp = salt; - - /* If it starts with the magic string, then skip that */ - if(strncmp(sp, magic, strlen(magic)) == 0) - sp += strlen(magic); - - /* It stops at the first '$', max 8 chars */ - for (ep = sp; *ep != '$'; ep++) { - if (*ep == '\0' || ep >= (sp + 8)) - return (NULL); - } - - /* get the length of the true salt */ - sl = ep - sp; - - /* Stash the salt */ - memcpy(salt_copy, sp, sl); - salt_copy[sl] = '\0'; - - MD5_Init(&ctx); - - /* The password first, since that is what is most unknown */ - MD5_Update(&ctx, pw, strlen(pw)); - - /* Then our magic string */ - MD5_Update(&ctx, magic, strlen(magic)); - - /* Then the raw salt */ - MD5_Update(&ctx, sp, sl); - - /* Then just as many characters of the MD5(pw, salt, pw) */ - MD5_Init(&ctx1); - MD5_Update(&ctx1, pw, strlen(pw)); - MD5_Update(&ctx1, sp, sl); - MD5_Update(&ctx1, pw, strlen(pw)); - MD5_Final(final, &ctx1); - - for(pl = strlen(pw); pl > 0; pl -= 16) - MD5_Update(&ctx, final, pl > 16 ? 16 : pl); - - /* Don't leave anything around in vm they could use. */ - memset(final, '\0', sizeof final); - - /* Then something really weird... */ - for (j = 0, i = strlen(pw); i != 0; i >>= 1) - if (i & 1) - MD5_Update(&ctx, final + j, 1); - else - MD5_Update(&ctx, pw + j, 1); - - /* Now make the output string */ - snprintf(passwd, sizeof(passwd), "%s%s$", magic, salt_copy); - - MD5_Final(final, &ctx); - - /* - * and now, just to make sure things don't run too fast - * On a 60 Mhz Pentium this takes 34 msec, so you would - * need 30 seconds to build a 1000 entry dictionary... - */ - for(i = 0; i < 1000; i++) { - MD5_Init(&ctx1); - if (i & 1) - MD5_Update(&ctx1, pw, strlen(pw)); - else - MD5_Update(&ctx1, final, 16); - - if (i % 3) - MD5_Update(&ctx1, sp, sl); - - if (i % 7) - MD5_Update(&ctx1, pw, strlen(pw)); - - if (i & 1) - MD5_Update(&ctx1, final, 16); - else - MD5_Update(&ctx1, pw, strlen(pw)); - - MD5_Final(final, &ctx1); - } - - p = passwd + strlen(passwd); - - l = (final[ 0]<<16) | (final[ 6]<<8) | final[12]; - strlcat(passwd, to64(l, 4), sizeof(passwd)); - l = (final[ 1]<<16) | (final[ 7]<<8) | final[13]; - strlcat(passwd, to64(l, 4), sizeof(passwd)); - l = (final[ 2]<<16) | (final[ 8]<<8) | final[14]; - strlcat(passwd, to64(l, 4), sizeof(passwd)); - l = (final[ 3]<<16) | (final[ 9]<<8) | final[15]; - strlcat(passwd, to64(l, 4), sizeof(passwd)); - l = (final[ 4]<<16) | (final[10]<<8) | final[ 5]; - strlcat(passwd, to64(l, 4), sizeof(passwd)); - l = final[11] ; - strlcat(passwd, to64(l, 2), sizeof(passwd)); - - /* Don't leave anything around in vm they could use. */ - memset(final, 0, sizeof(final)); - memset(salt_copy, 0, sizeof(salt_copy)); - memset(&ctx, 0, sizeof(ctx)); - memset(&ctx1, 0, sizeof(ctx1)); - (void)to64(0, 4); - - return (passwd); -} - -#endif /* defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT) */ |
